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| Number | Title | Issue Date |
| 7965479 | Over-current and over-voltage protection assembly apparatus An over-current and over-voltage protection assembly apparatus including an over-current protection (OCP) device and an over-voltage protection (OVP) device is provided. One end of the OCP device is electrically connected to a first connection point, and the other e... | 06/21/2011 |
| 7843672 | Input/Output regulating circuitry with self-electrostatic-discharge protection An I/O regulating circuitry is provided. The I/O regulating circuitry omits the ESD device in a CMOS process with a minimized critical dimension to reduce chip size while still maintaining electrostatic discharge immunity. The I/O regulating circuitry is applied in ... | 11/30/2010 |
| 7773354 | Voltage protection circuit for power supply device and method therefor A device is disclosed that includes an interface and an integrated circuit. The interface is communicatively coupled to a network connection to provide power and data to a power over Ethernet (PoE) powered device via the network connection. The integrated circuit is... | 08/10/2010 |
| 7511930 | System and method for high voltage protection of powered devices A powered device includes a rectifier circuit, a logic circuit, and a power protection element. The rectifier circuit includes two inputs to receive an input voltage from a powered network and includes two output terminals to provide a rectified power supply voltage... | 03/31/2009 |
| 7368768 | Semiconductor integrated circuit device with protection capability for protection circuits from static electrical charge Semiconductor Integrated Circuit (IC) devices such as diode and MOSFET that protect circuits from Electrostatic Discharge (ESD) are formed. A diode is formed by an N+ (or P+) and P+ (or N+) diffusion layers within an N (or P) well on a P (or N) type semiconductor su... | 05/06/2008 |
| 7339458 | Power line communications interface and surge protector There is provided a system that includes an AC power input port for connection to an AC power line, an AC power output port for providing power from the AC power line, an AC power surge suppression circuit for limiting voltage at the AC power output port, a data por... | 03/04/2008 |
| 7305311 | Arc detection and handling in radio frequency power applications A radio frequency power delivery system comprises an RF power generator, arc detection circuitry, and control logic responsive to the arc detection circuitry. A dynamic boundary is computed about the measured value of a parameter representative of or related to the ... | 12/04/2007 |
| 7268994 | Relay driving apparatus and method having relay contact turn-on holding function A relay driving apparatus has a control circuit, which supplies a first voltage to a relay coil in response to a relay driving signal to turn on a relay contact, and thereafter a second voltage lower than the first voltage to the relay coil to keep an ON state of th... | 09/11/2007 |
| 7253637 | Arc fault circuit interrupter system In order to determine whether arcing is present in an electrical circuit, a sensor signal corresponding to current in said electrical circuit is processed. The sensor signal is filtered to determine the presence of noise in a predetermined frequency range and produc... | 08/07/2007 |
| 7245470 | Unsafe voltage shutoff control A circuit and device protects connected equipment from a broad range of unsafe conditions of over-voltage and under-voltage by disconnecting the line voltage before surge protection components, generally MOVs, are damaged from sustained surges. However, nuisance tri... | 07/17/2007 |
| 7242566 | Surge protection device A surge suppression circuit with a thermal cutoff includes a first surge suppressor in series with a first thermal cutoff device between a phase conductor and a neutral conductor. A second surge suppressor in series with a second thermal cutoff device is between the... | 07/10/2007 |
| 7236342 | In-line passive barrier for intrinsically safe communication network A passive isolator may fit between two serial network cables to convert a standard serial network to a serial network suitable for use in hazardous environments. ... | 06/26/2007 |
| 7233474 | Vehicle electrical protection device and system employing same An electrical protection device is provided. The device can be removably attached to or mounted inside of a power source, such as a vehicle, e.g., automobile, battery and can employ a replaceable fuse element. The device includes an overcurrent protection element, s... | 06/19/2007 |
| 7158041 | Electrical protection device and method for a communication circuit A protection device for a communication circuit that includes a sensor monitoring a protection device parameter and an indication module coupled to the sensor. The indication module generates an indication output as a function of the protection device parameter indi... | 01/02/2007 |
| 7152781 | Manufacturing system with intrinsically safe electric information storage The present invention is a manufacturing system including a hazard zone and a non-hazard zone. The system includes a storage device, located in the hazard zone, for electrically storing information. The system further includes a communication device, also located in... | 12/26/2006 |
| 7151656 | Arc fault circuit interrupter system A system for determining whether arcing is present in an electrical circuit in response to a sensor signal corresponding to current in the circuit includes a circuit for analyzing the sensor signal to determine the presence of broadband noise in a predetermined rang... | 12/19/2006 |
| 7136265 | Load recognition and series arc detection using bandpass filter signatures A method and system for determining whether arcing is present in an electrical circuit includes sensing a change in an alternating current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband n... | 11/14/2006 |
| 7119606 | Low-power, low-area power headswitch An N-FET headswitch has improved performance (e.g., less leakage current, lower ON resistance, and smaller area) over a conventional P-FET headswitch. The N-FET headswitch includes at least one N-FET device and couples between a power supply and a load circuit, whic... | 10/10/2006 |
| 7085662 | Power quality indicator There is provided a method and a power quality indicator coupled to an electrical circuit. The indicator comprises the summing device configured to received a sensed wave form from the electrical circuit, including at least one voltage wave form. A summing device is... | 08/01/2006 |
| 7068480 | Arc detection using load recognition, harmonic content and broadband noise A method of determining whether arcing is present in an electrical circuit includes sensing a change in current in the circuit and developing a corresponding input signal, analyzing the input signal to determine the presence of broadband noise in a predetermined ran... | 06/27/2006 |
| 7012795 | Electromagnetic circuit breaker assembly having reverse polarity protection An electromagnetic circuit breaker assembly, comprising at least one circuit breaker, is provided with a reverse polarity circuit that reduces the voltage presented to the terminals of the circuit breaker to which it is electrically connected when the terminals are ... | 03/14/2006 |
| 7012421 | Energy calculation methods in power distribution systems A method of performing energy calculations in a power distribution system is provided. The method includes sampling a first voltage at a first module in the power distribution system; communicating the first voltage from the first module to a central controller; per... | 03/14/2006 |
| 6992873 | Automated AC line filter and surge suppression apparatus and method A automated AC line filter and surge suppression apparatus 100 having an inductive current sense loop (ICSL) circuit 10 for sensing inductive current at a load and controlling the application of AC line filter 112 to an AC power line to the load... | 01/31/2006 |
| 6947266 | Power protection device A power protection device protects electronic equipment from AC supply system disturbances. An electronically controlled relay circuit passes power to connected equipment if the electrical supply system, to which the equipment is connected, is properly wired for con... | 09/20/2005 |
| 6940282 | Switchable transmit array coil A magnetic resonance imaging system comprises an array of radio frequency (RF) coils for producing controlled RF fields applying excitation signals to a volume of interest and a coil control circuitry configured to excite a single coil from the array of radio freque... | 09/06/2005 |
| 6932624 | Modular signal and power connection device An electrical connection box for wall mounting provides a recessed external plug for receiving or transmitting power to electronic components. The connection box is configured to receive a variety of signal connection modules for interconnecting associated audio/vis... | 08/23/2005 |
| 6577479 | Arc suppression circuit A circuit for suppressing electrical arcing in an ion beam source or other plasma devices is provided. The arc suppression circuit of this invention detects current rises on ion beam source grids which cause arcing, disconnects the current flowing to the ... | 06/10/2003 |
| 6543673 | Dissolving shunt connection system for ESD sensitive components A method and system are disclosed for protecting an electrical component from electrostatic discharge prior to its electrical connection to an additional component. Specifically, a flex on suspension circuit of a disc drive that is electrically connected ... | 04/08/2003 |
| 6452235 | Floating body ESD protection circuit A floating body ESD protection circuit positioned between and coupled to an I/O pad and an internal circuit. A p-type depletion mode transistor is used to control the body of an n-type enhancement mode transistor. When the p-type depletion mode transistor... | 09/17/2002 |
| 6366434 | Apparatus for safely disconnecting an electrical load from an electrical DC voltage supply An apparatus for disconnecting an electrical load from an input DC voltage includes first and second lines which carry the input DC voltage to the electrical load. A fuse is connected in series in the first line. The switching contact of a first relay is ... | 04/02/2002 |
| 6295189 | Protection for battery module with diode memory A battery module including at least one cell, at least one sensor, an interrupter device such as a fuse connected in series with the cells and an electronic switch. The electronic switch includes power transistors for short circuiting the series-connected... | 09/25/2001 |
| 6222441 | Process and circuit for connecting an actuator to a line An improved circuit and method for connecting a device to an actuator-sensor interface ("ASI") bus. The circuit provides the proper AC and DC coupling between the device and bus during normal operation, while providing AC and DC decoupling in the event of... | 04/24/2001 |
| 6118639 | Fast acting disconnect system for protecting surge suppressors and connected utilization equipment from power line overvoltages A fast acting disconnect system is incorporated with a transient voltage surge suppressor to protect the surge suppressor and the connected utilization equipment from power frequency overvoltages. A resettable circuit breaker permits reconnection after di... | 09/12/2000 |
| 5939921 | Drive circuit for a field-effect-controlled semiconductor component which opens a switch when a predetermined current is exceeded A drive circuit for a field-effect-controlled semiconductor component reduces a charging current for driving the field-effect-controlled semiconductor component when a load current limiting responds. That prevents an increase in current consumption of the... | 08/17/1999 |
| 5812352 | Circuit breaker tester Apparatus and method for opening circuit breakers in a circuit are disclosed. The apparatus includes input terminals adapted to be connected to the circuit, a switch and a load. When the apparatus is connected to the circuit and the switch is closed, a cu... | 09/22/1998 |
| 5805394 | Overvoltage protection circuit for a generating system utilizing a fault current sensing Circuit in combination with a shunting circuit An overvoltage protection circuit utilizes the fault current sensing capabilities of a differential protection circuit in combination with a shunting circuit to protect a power generating system against an overvoltage condition. The circuit offers the com... | 09/08/1998 |
| 5629570 | Paint flow control interface Paint flow control interface circuitry for passing electrical signals across a paint booth barrier including a feedback signal indicating a paint flow parameter from a parameter transducer within the paint booth, includes passive resistive intrinsically s... | 05/13/1997 |
| 5473494 | Electrical power supply system An electrical power supply system includes an electrical power source system connected to a bus bar and a plurality of electric power transmission systems each connected via circuit breakers to the bus bar. The supply system has overvoltage suppression eq... | 12/05/1995 |
| 5408379 | Device for opening a circuit and device for protecting the circuit against surges An insulating substrate has a heat generating resistor and an electrical conductor on its surface. A pair of conductors, such as power or communication leads, are connected to a protected circuit. A rated voltage element and the heat generating resistor i... | 04/18/1995 |
| 5402039 | Non-automatic resetting thermal-protected ballast An embodiment of the present invention is a ballast for a high intensity discharge lamp that includes a non-automatically resetting thermal protector thermally coupled to a coil wound on a core and insulation between the coil and the core. Only one cycle ... | 03/28/1995 |
